Nemo iudex in causa sua

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Nemo iudex in causa sua (or nemo iudex in sua causa) is a Latin phrase that means, literally, no-one should be a judge in his own cause. It is a principle of natural justice that no person can judge a case in which they have an interest.[1] The rule is very strictly applied to any appearance of a possible bias, even if there is actually none: "Justice must not only be done, but must be seen to be done".[2]

May also be called:

  • nemo iudex idoneus in propria causa est
  • nemo iudex in parte sua
  • nemo debet esse iudex in propria causa
  • in propria causa nemo iudex

The legal effect of a breach of natural justice is normally to stop the proceedings and render any judgment invalid; it should be quashed or appealed, but may be remitted for a valid re-hearing.

See also[edit]

References[edit]

  1. ^ "Legal definition of Nemo iudex in causa sua". legal-glossary.org. Retrieved 2014-02-24. 
  2. ^ R v Sussex Justices, ex parte McCarthy, [1924] 1 KB 256, [1923] All ER 233